Math Calculators

Frequently Asked Questions

❓ What is the Pythagorean theorem?

✅ The Pythagorean theorem states that in a right triangle, the square of the hypotenuse equals the sum of squares of the other two sides: a² + b² = c². It is one of the most fundamental relationships in geometry.

❓ What is the difference between permutations and combinations?

✅ Permutations consider the order of items (arrangements), while combinations do not (selections). For example, choosing 3 winners from 10 people where order matters uses permutations; where order does not matter uses combinations.

❓ How do I calculate standard deviation?

✅ Standard deviation measures the spread of data points from the mean. Calculate it by finding the square root of the variance: take each data point's difference from the mean, square it, average the squares, and take the square root.